Alkaline non-polluting aluminum alloy electrochemical polishing solution

A polishing liquid and aluminum alloy technology, which is applied in the field of electrochemical polishing, can solve the problems of high price, high cost, and poor production conditions, and achieve the effects of less aluminum loss, short polishing time, and reduced production costs

Inactive Publication Date: 2016-04-06
无锡市万士达羽绒制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most widely used method in China is the three-acid method, that is, phosphoric acid, sulfuric acid, and chromic acid method. This method is costly, and the carcinogenic chromium ions will be brought out due to the hydrogen precipitation at the cathode during polishing. The production conditions are poor. Developed countries such as the United States and Europe have basically adopted new types of non-toxic Chromium instead
A few domestic companies are also trying new chromium-free methods. The main components of the solution are expensive phosphoric acid and polymer PEG, and the operating temperature of this method is still as high as 80-90°C, which is too expensive.

Method used

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  • Alkaline non-polluting aluminum alloy electrochemical polishing solution
  • Alkaline non-polluting aluminum alloy electrochemical polishing solution
  • Alkaline non-polluting aluminum alloy electrochemical polishing solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1T

[0022] Example 1 with T A Be the performance detection of the polishing liquid of the present invention of brightener

[0023] Cut the industrial pure aluminum with a purity of 99.2% into pieces, after mechanical polishing, metallographic sandpaper grinding and chemical degreasing, use the polishing solution shown in Table 1 and the process conditions shown in Table 1, with stainless steel as the auxiliary electrode , The potentiostat controls the voltage, the electric mixer controls the flow rate of the solution, and the constant temperature bath controls the operating temperature for polishing, followed by washing, drying and testing the quality.

[0024] According to production needs, comprehensively evaluate the polishing effect from various aspects:

[0025] (1) The light reflectance of the silver mirror is 100% as a reference, and the light reflectance of the polished aluminum surface is measured by a photocell to indicate the degree of polishing leveling. The high...

Embodiment 2T

[0032] Example 2 with T B Be the performance detection of the polishing liquid of the present invention of brightener

[0033] The specific detection process is referring to embodiment 1, with T B The composition of the polishing liquid as the main brightener, the parameters of the polishing process used and the polishing effect are shown in Table 2.

[0034] Table 2, with T B Polishing test results of the main brightener

[0035]

[0036] Table 2 for T B Brightener, S B The test results obtained for the stabilizer. where T A with T B The mechanism of action may be similar; while S B It has a strong complexing effect and can inhibit the hydrolysis of aluminum salts, thereby prolonging the service life of the solution.

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PUM

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Abstract

The invention discloses an alkaline non-polluting aluminum alloy electrochemical polishing solution, including an alkaline substance, a brightener and a stabilizer. The brightener is preferably TA or TB; and the stabilizer is preferably SA or SB. The surface subjected to electrochemical by the polishing solution has high flatness, and the polishing solution has the advantages of low energy consumption, short polishing time, less aluminum consumption and long life cycle. The polishing method can significantly reduce production costs, improve the working environment, improve the quality of the polished surface, and has broad application prospect.

Description

technical field [0001] The invention relates to the technical field of electrochemical polishing, in particular to an alkaline and pollution-free aluminum alloy electrochemical polishing solution. Background technique [0002] Aluminum and aluminum alloys have excellent comprehensive properties such as high specific strength, low density, good plasticity, fluidity and thermal conductivity, and are widely used, such as applications in aviation, construction, daily hardware and high-tech fields. The surface state of aluminum alloy is various, and aluminum is a relatively active metal, its standard potential is very negative (-1.67V), it is easy to oxidize in the air, forming a dense and strong oxide film (Al 2 o 3 ); in the use of aluminum alloy, there are generally higher requirements for its surface roughness, in order to improve the corrosion resistance and surface decoration effect of its products, it needs to be polished. [0003] Among the commonly used polishing metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/20
Inventor 蒋健
Owner 无锡市万士达羽绒制品有限公司
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